doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> June 2018 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Explanations to subfields in Frame Control Date Submitted: 18 June 2018 Source: Nikola Serafimovski, Chong Han, Stephan Berner, Mostafa Afgani (pureLiFi) Address: 9 Haymarket Terrace, Edinburgh, UK, EH12 5EZ Mobile:[+44-7503016565], E-Mail:[chong.han@purelifi.com] Re: Abstract: Explanations to subfields (i.e., To DS and From DS) in Frame Control Purpose: Contribution to IEEE 802.15.13 Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15. Chong Han (pureLiFi) <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> June 2018 Explanations to subfields in Frame Control Nikola Serafimovski (pureLiFi), Chong Han (pureLiFi), Stephan Berner (pureLiFi), Mostafa Afgani (pureLiFi) Chong Han (pureLiFi) <author>, <company>

Frame Control field ‘To DS’ and ‘From DS’ subfields June 2018 Frame Control field From the last meeting Bits: 2 2 4 1 6 Frame Version Type Sub-type Security enabled ACK request Reserved Proposal Bits: 2 2 4 1 3 Frame Version Type Sub-type To DS From DS Security enabled ACK request ACK info Reserved ‘To DS’ and ‘From DS’ subfields The two subfields are needed to indicate if the frame is entering or leaving the wireless environment. The combinations of these two subfields reflect which address fields out of the four (RA, TA, DA and SA) are required by the frame. Chong Han (pureLiFi)

Combinations of subfields (1) June 2018 Combinations of subfields (1) Scenario To DS From DS Meaning Receiver address Transmitter address Auxiliary address 1 Auxiliary address 2 1 A Data frame from one device to another device within the same local network RA=DA TA=SA OWPAN ID - 2 A Data frame destined for the DS DA 3 A Data frame exiting the DS SA 4 Reserved Scenario 1: Example 1) Device a sends a data frame to the destination Device b; 2) or Device a sends a data frame to Coordinator. 1) Frame control: … To DS=0; From DS=0; … MAC header: …, RA=b, TA=a, A1=OWPAN ID, … 2) Frame control: … To DS=0; From DS=0; … MAC header: …, RA=c, TA=a, A1=OWPAN ID, … c a b Chong Han (pureLiFi)

Combinations of subfields (2) June 2018 Combinations of subfields (2) Scenario To DS From DS Meaning Receiver address Transmitter address Auxiliary address 1 Auxiliary address 2 1 A Data frame from one device to another device within the same local network RA=DA TA=SA OWPAN ID - 2 A Data frame destined for the DS DA 3 A Data frame exiting the DS SA 4 Reserved Distribution System Scenario 2: Device a sends a data frame (e.g., request for IP address) to the destination d in the DS via Coordinator c. Frame control: … To DS=1; From DS=0; … MAC header: …, RA=OWPAN ID, TA=SA=a, A1=DA=d, … d c a Chong Han (pureLiFi)

Combinations of subfields (3) June 2018 Combinations of subfields (3) Scenario To DS From DS Meaning Receiver address Transmitter address Auxiliary address 1 Auxiliary address 2 1 A Data frame from one device to another device within the same local network RA=DA TA=SA OWPAN ID - 2 A Data frame destined for the DS DA 3 A Data frame exiting the DS SA 4 Reserved Distribution System Scenario 3: The packet is entering the wireless environment coming from the DS. DS sends a data frame to the destination Device a via Coordinator c. Frame control: … To DS=0; From DS=1; … MAC header: …, RA=DA=a, TA=OWPAN ID, A1=SA=d, … d c a Chong Han (pureLiFi)